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M.C.B. Wheel Assemblies (Steel)

These M.C.B. type assemblies are the finest heavy duty wheels made. They are equipped throughout with standard self-aligning bearings, which take all thrust, as well as radial loads. The wide bearing spacing, make possible by the outboard style of mounting, is a decided advantage in properly distributing the combined thrust and radial loads encountered in crane operation. The outer race of one bearing on each shaft has a small amount of float to provide for expansion of the shaft. Bearings may be inspected by removing the cover plates.

Wheels
Cast steel, double flanged, with treads finished for the runway rail specified.
Wheel Bearings
Standard heavy duty, self-aligning, spherical roller bearings.
Wheel Bearing Housings
Cast steel with finished mounting faces and removable cover plates
Axles
Finished all over, pressed in finished wheel bore.
Wheel Gear
Steel with standard pitch cut teeth, pressed and keyed on finished wheel hub.
Pinion Gear
Steel with standard pitch cut teeth.
Stub Shaft
Finished all over, extended end has a standard keyway for coupling to a squaring shaft.
Stub Shaft Bearings
Standard self-aligning ball bearings mounted in flange type housings with removable covers plates.
Lubrication
All bearings are provided with grease fittings for pressure lubrication.
DRIVER IDLER

MCB Line Art

ITEM
NO.
TREAD
DIA.
(IN)
TYPE CAPACITY
PER WHEEL
(LBS)
FOR MAX.
A.S.C.E
RAIL
(# RAIL)
GEAR
RATIO
WGT.
(LBS)
DIMENSIONS IN INCHES APPLYING TO BOTH PLAIN & GEARED TYPES
A B C D E G J M O P R S T U
3891 12 NON-
GEARED
20,000 40   206 12 13-1/2 2-7/8 6-3/8 7-1/2 14-9/16                
3892 12 GEARED 20,000 40 4.10-1 317 12 13-1/2 2-7/8 6-3/8 7-1/2 14-9/16 11-7/8 4 1-7/16 4-3/4 3/8 8.20 4.95 7/8
3893 15 NON-
GEARED
20,000 70   267 15 16-1/2 3 6-7/8 8 15-3/4                
3894 15 GEARED 20,000 70 4.00-1 377 15 16-1/2 3 6-7/8 8 15-3/4 12-1/2 4-1/4 1-7/16 4-3/4 3/8 10.00 6.63 7/8
3895 18 NON-
GEARED
30,000 70   355 18 19-1/2 3 7 8-1/4 16-1/4                
3896 18 GEARED 30,000 70 4.11-1 518 18 19-1/2 3 7 8-1/4 16-1/4 15 6 1-15/16 6 1/2 11.50 7.63 1
3897 21 NON-
GEARED
50,000 80   578 21 22-3/4 3-1/2 8 9-1/2 18-1/2                
3898 21 GEARED 50,000 80 4.32-1 845 21 22-3/4 3-1/2 8 9-1/2 18-1/2 16 6 2-7/16 7 5/8 14.17 9.67 1-1/8
3899 24 NON-
GEARED
70,000 100   825 24 25-3/4 3-5/8 8-7/8 10 20-1/2                
3900 24 GEARED 70,000 100 4.11-1 1197 24 25-3/4 3-5/8 8-7/8 10 20-1/2 16-7/8 6 2-7/16 7-1/2 5/8 15.33 9.83 1-1/4

The sizes and capacities listed above are a reference to the most common sizes of this equipment. If you have a different capacity, irregular size or some other need that must be met by our equipment, we will be happy to design one of these pieces of equipment to meet your special needs while also meeting or exceeding our interpretation of the appropriate ANSI / ASME. standards.

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Copyright 2000 Downs Crane & Hoist Co., Inc.
Last modified: February 21, 2011